<!DOCTYPE HTML>
<html>
<head>
  <title>Test track interfaces when consuming a MediaStream from gUM</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  <script type="text/javascript" src="manifest.js"></script>
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
function startTest() {
  navigator.mozGetUserMedia({audio:true, video:true, fake:true},
    function(stream) {
      var element = document.createElement("video");

      var audioOnchange = 0;
      var audioOnaddtrack = 0;
      var audioOnremovetrack = 0;
      var videoOnchange = 0;
      var videoOnaddtrack = 0;
      var videoOnremovetrack = 0;
      var isPlaying = false;

      element.audioTracks.onaddtrack = function(e) {
        audioOnaddtrack++;
      }

      element.audioTracks.onremovetrack = function(e) {
        audioOnremovetrack++;
      }

      element.audioTracks.onchange = function(e) {
        audioOnchange++;
      }

      element.videoTracks.onaddtrack = function(e) {
        videoOnaddtrack++;
      }

      element.videoTracks.onremovetrack = function(e) {
        videoOnremovetrack++;
      }

      element.videoTracks.onchange = function(e) {
        videoOnchange++;
      }

      function checkTrackRemoved() {
        if (isPlaying) {
          is(element.audioTracks.length, 0, 'The length of audioTracks should be 0.');
          is(element.videoTracks.length, 0, 'The length of videoTracks should be 0.');
        }
      }

      function onended() {
        ok(true, 'Event ended is expected to be fired on element.');
        checkTrackRemoved();
        element.onended = null;
        element.onplaying = null;
        element.onpause = null;
        SimpleTest.finish();
      }

      function checkTrackAdded() {
        isPlaying = true;
        is(audioOnaddtrack, 1, 'Calls of onaddtrack on audioTracks should be 1.');
        is(element.audioTracks.length, 1, 'The length of audioTracks should be 1.');
        ok(element.audioTracks[0].enabled, 'Audio track should be enabled as default.');
        is(videoOnaddtrack, 1, 'Calls of onaddtrack on videoTracks should be 1.');
        is(element.videoTracks.length, 1, 'The length of videoTracks should be 1.');
        is(element.videoTracks.selectedIndex, 0,
           'The first video track is set selected as default.');
      }

      function setTrackEnabled(enabled) {
        element.audioTracks[0].enabled = enabled;
        element.videoTracks[0].selected = enabled;
      }

      function checkTrackChanged(calls, enabled) {
        is(audioOnchange, calls, 'Calls of onchange on audioTracks should be '+calls);
        is(element.audioTracks[0].enabled, enabled,
           'Enabled value of the audio track should be ' +enabled);
        is(videoOnchange, calls, 'Calls of onchange on videoTracks should be '+calls);
        is(element.videoTracks[0].selected, enabled,
           'Selected value of the video track should be ' +enabled);
        var index = enabled ? 0 : -1;
        is(element.videoTracks.selectedIndex, index,
           'SelectedIndex of video tracks should be ' +index);
      }

      function onpause() {
        element.onpause = null;
        if (element.ended) {
          return;
        }
        if (steps == 1) {
          setTrackEnabled(false);
          element.onplaying = onplaying;
          element.play();
          steps++;
        } else if (steps == 2) {
          setTrackEnabled(true);
          element.onplaying = onplaying;
          element.play();
          steps++;
        }
      }

      function onplaying() {
        element.onplaying = null;
        if (element.ended) {
          return;
        }
        if (steps == 1) {
          element.onpause = onpause;
          element.pause();
          checkTrackAdded();
        } else if (steps == 2) {
          element.onpause = onpause;
          element.pause();
          checkTrackChanged(1, false);
        } else if (steps == 3) {
          checkTrackChanged(2, true);
          stream.stop();
        }
      }

      var steps = 0;
      element.srcObject = stream;
      element.onplaying = onplaying;
      element.onended = onended;
      element.play();
      steps++;
    },
    function(err) {
      ok(false, 'Unexpected error fired with: ' + err);
      SimpleTest.finish();
    }
  );
}

SimpleTest.waitForExplicitFinish();
SpecialPowers.pushPrefEnv(
  {
    "set": [
      ["media.track.enabled", true]
    ]
  }, startTest);

</script>
</pre>
</body>
</html>
